Stirrup assembly



w. E MATHEWS STIRRUP ASSEMBLY May 23, 1939.

Filed May 9, 1938 INVENTOR WE. Math/e105 rfl Patented May 23, 1939 UNITED STA-res William E. Y

4 ApplicationfM ayf 9} 1938 ,fS e ria1 No. 296,712 I j 4 clans-g (o1. 72-"- 22) My invention relates to a stirrup assembly for use in reinforced concrete. beams in buildings and has for an object the provision of an assembly adapted to be fabricated and folded for 3 shipping. to the point of use.

My invention further contemplates the provision of a stirrup assembly in which the stirrups are positioned at spaced intervals along their spacing bars or rods and held against displacement in notches formed in the spacing rods by means of spring clips formed of flexible steel wire.

My invention further contemplates the provision of an improved spacing chair adapted to support the stirrup assembly and reinforcement bars in their proper positions to afford the greatest strength in the beam.

My invention embodies other novel features, details of construction and arrangement of parts which are hereinafter set forth in the specification and claims and illustrated in. the accompanying drawing, forming part thereof, wherein:

Fig. 1 is a sectional view taken along the line I-I of Fig. 2, showing my improved stirrup assembly;

Fig. 2 is a sectional view taken along the line II-II of Fig. 1;

Fig. 3 is a fragmentary top plan view showing one end of the spacing chair employed to support and position the stirrup assembly and reinforcement bars;

Fig. 4 is a detail View showing the spacing rod; and

Fig. 5 is a fragmentary sectional view taken transversely of a beam form, showing a modified form of stirrup.

Referringnow to the drawing for a better understanding of my invention, I show a beam 50 form having a bottom 6 and side walls 1 adapted to receive the reinforcements and concrete. The reinforcements comprise a plurality of stirrups 8 which are mounted at spaced intervals in notches 9 formed in the spacing members H and held against accidental displacement therefrom by means of spring clips I2. The spring clips are formed with a U-shaped portion l3 adapted to receive the'upright portions M of the stirrups and with a short arm I6 and long arm l1 adapted to hook over the spacing bars ll.

Aplurality of spacing chairs I9 are mounted on the bottom 6 of the form to receive the cross portions 2| of the stirrups. The chairs comprise an angle-shaped body portion 22 which ex- 3 tends substantially the width of the beam form having'ia'pair of legs Thelegs are formed of anglefshaped' metal and have arcuate-shaped offsets" 2'4 --rormea in their vertically disposed portions 26 while their horizontally disposed portions 21 are secured to the horizontally disposed portion 28 of the body portion 22 by means of single rivets 29 which permit pivotal movement of the legs. The vertically disposed portion 3| of the body portion 22 is formed with recesses 32' adapted to receive reinforcing bars 33 and with offset ears 34 which serve to position the stirrups on the legs of the chair. A pair of apertures are formed in the portions 21 of the legs to receive nails 36 to secure the chairs to the bottom of the beam form.

The stirrups 8 and their spacing rods H are preferably assembled at the factory and shipped to the point of use in a folded condition inwhich the spring clips l2 serve as hinges for the upright portions of the stirrups and permit the stirrups to be pivoted about their upright portions to form a fiat, compact mass for shippingor storage. When the spacing rods l I are formed with notches 9 at spaced intervals conforming to the design of the architect and then secured to the stirrups by means of the improved spring clips l2, it is obvious that the assembly will remain in its designed state and that the stirrup spacing will not readily be accidentally changed.

By nailing the chair in position within the beam form, and providing notches 32 to receive the reinforcing bars 33, and forming ears 34 to position the stirrups on the legs 23, it will be seen that the whole beam assembly will be accurately positioned within the form to provide the maximum strength within the concrete beam after the concrete has been poured and hardened.

In Fig. 5 I show a modified form of stirrup 4| having legs 42 welded thereto and serving to hold the stirrups in spaced relation to the bottom and sides of the form 43, the legs having a vertical portion 44 and offset portion46. The stirrups are secured in spaced relation by means of spacing rods and spring clips as illustrated in the preferred form.

While I have shown my invention inbut two forms it is obvious to those skilled in the art that it is not so limited but is susceptible of various changes and modifications without departing from the spirit thereof; and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art.

I claim:

1. In a. reinforcement assembly for concrete beams, a. plurality of spacing rods having notches formed therein at spaced intervals, a plurality of stirrups having vertically disposed portions positioned in the notches formed in the spacing rods, and spring clips having U-shaped portions to receive the vertically disposed portions of the stirrups and arms to engage the spacing rods for pivotally connecting the stirrups to said spacing rods.

2. In a reinforcement assembly for concrete beams, a plurality of spacing rods having notches formed therein at spaced intervals, a plurality of stirrups having vertically disposed portions positioned in the notches formed in the spacing rods, spring clips for pivotally connecting said stirrups in the notches formed in the spacing rods, and chairs supporting and engaging the stirrups against lateral and pivotal movement.

3. In a reinforcement assembly for concrete beams, the combination with reinforcing bars and a plurality of stirrups connected to each other, of a chair having a body portion, legs provided on said body portion to support the stirrups and the reinforcing bars, said legs being pivotally connected to the body portion and disposed at right angles thereto when supporting the stirrups and reinforcing bars, means formed on the body portion of the chair for positioning the stirrups, and means provided on the body portion of the chair for positioning the reinforcing bars.

4. In a reinforcement assembly for concrete beams, the combination with reinforcing bars and a plurality of stirrups connected to each other, of a chair having a body portion formed angle-shaped in transverse section, legs provided on said body portion to support the stirrups and the reinforcing bars and formed angle-shaped in transverse sec-tion, rivets for pivotally connecting said legs on said body por tion, means formed on the body portion of the chair for positioning the stirrups, and means provided on the body portion of the chair for pcsitioning the reinforcing bars.

WILLIAM E. MATHEWS. 

